未能充分发挥作用
Not fully functioning
以上为机器翻译结果，长、整句建议使用 人工翻译 。
炮舰轰击虽然较为准确，但德国人加强了大炮阵地，所以也未能充分发挥作用。
Although the naval bombardment was more accurate, it was not much more effective against the hardened German gun emplacements.
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